Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 19, Problem 12RQ
What is a cline?
- the slope of a mountain where a population lives
- the degree to which a mutation helps an individual survive
- the number of individuals in the population
- gradual geographic variation across an ecological gradient
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Students have asked these similar questions
Which one of the following statements best describes the difference between mutation
and substitution in a population?
Mutation is the origin of a new allele in an individual organism, and substitution is the
evolutionary replacement of one allele by another.
Mutation is the origin of a deleterious allele, and substitution is the increase in frequency of an
advantageous allele by positive selection.
Mutation is change in the DNA sequence within a functional gene, and substitution involves
nucleotide changes in noncoding regions of the genome.
What is NOT true about mutations?
Group of answer choices
Without mutations, there would be no genetic variation
Mutations are usually deleterious
Mutations are a relatively weak force of evolution
Mutations are always balanced with natural selection
What force, which changes gene frequencies, occurs if there is a failure to reproduce or if individuals become isolated from the rest of their population?
mutation
radiation
genetic drift
nonrandom mating
Chapter 19 Solutions
Biology 2e
Ch. 19 - Figure 19.2 In plants, violet flower color (V) is...Ch. 19 - Figure 19.4 Do you think genetic drift would...Ch. 19 - Figure 19.8 In recent years, factories have become...Ch. 19 - What is the difference between micro- and...Ch. 19 - Population genetics is the study of: how selective...Ch. 19 - Which of the following populations is not in...Ch. 19 - One of the original Amish colonies rose from a...Ch. 19 - When male lions reach sexual maturity, they leave...Ch. 19 - Which of the following evolutionary forces can...Ch. 19 - What is assortative mating? when individuals mate...
Ch. 19 - When closely related individuals mate with each...Ch. 19 - What is a cline? the slope of a mountain where a...Ch. 19 - Which type of selection results in greater genetic...Ch. 19 - When males and females of a population look or act...Ch. 19 - The good genes hypothesis is a theory that...Ch. 19 - Solve for the genetic structure of a population...Ch. 19 - Explain the Hardy-Weinberg principle of...Ch. 19 - Imagine you are trying to test whether a...Ch. 19 - Describe a situation in which a population would...Ch. 19 - Describe natural selection and give an example of...Ch. 19 - Explain what a cline is and provide examples.Ch. 19 - Give an example of a trait that may have evolved...Ch. 19 - List the ways in which evolution can affect...
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- Nonearrow_forwardWhat is the gene pool? A part of a chromosome that encodes an RNA or protein product in its DNA sequence All of the alleles of all the genes in a population The abundance of a particular allele among members of a population Forms of a gene with slightly different DNA sequences that may encode slightly different versions of the gene's productarrow_forwardAs evolution is the change in allele frequency in a population over time … Explain the evolution of bacteria in terms of changes to the frequency of the NDM-1 gene.arrow_forward
- The color of a dragonfly body is determined by a single gene. Two dragonflies homozygous for blue coloration (meaning they have two copies of the blue allele) produce a single offspring with brown coloration. Brown color appeared in this offspring as a result of Gene flow Bottleneck effect Genetic drift Mutationarrow_forwardFrom an evolutionary point of view talk about how natural selection has played in biology processes. Make sure to include the words/processes: replication, variation, persistence, RNA, DNA, mutations, scarcity, proton pump, coalition, depletion, surivival, crisis.arrow_forwardWord Bank 2: gradual nonrandom natural selection adapted frequent frequency generations natural selection survive reproduce reproduce natural selection Natural Natural selection is the gradual, Selection process by which biological traits become either more or less in a population based on how much the organisms carrying them are able to It is a key part of how OCcurs.arrow_forward
- A gene that is undergoing evolutionary conservation most likely; Is not currently functional Code for an essential, basic life function be in hardy weinberg equilibrium Is evolving quickly due to sexual selectionarrow_forwardThe most important feature that enables a gene to act as a molecular clock is Group of answer choices: a recent origin by a gene duplication event a large number of base pairs in the genome being acted upon by natural selection a reliable average rate of mutationarrow_forwardWhich of the following describes stabilizing selection?! Migration of individuals to an area with different conditions Prevents mutations from occurring Intermediate variants are favored in a population Usually results in two distinct phenotypesarrow_forward
- Polar beans unike their closast relative the Black Bear, have white fur A genetic mutation has changed the gene that codes for fur color This change in fur color has allowed this species to migrate to more northern re where it was camouftaged in the snow Based on this example, which of the following most appropriately describes genetic mutations? Mutations are unnatural processes that reduce genetic diversity O Mutations are natural processes that can increase genetic diversity O Mutations are unnatural processes that are always harmful to genetic diversity O Mutations are natural processes that always affect the physical traits of organismsarrow_forwardPlease help a bit confusedarrow_forwardWhich of the following is unlikely to contribute to natural selection Mutations of the somatic cells Mutations of the reproductive cells Natural disaster Infectious disease in the populationarrow_forward
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